Economizer for fastening-inserting machines



Sept. 27 1927 D. MacARTl-IUR ECONOMIZER FOR FASTENING INSERTING MACHINES Sheets-Sheet 1 Original Filed April 12. 1919 spt. 27, 1927.

D. MaCARTHUR EGONOMIZER- FjoR FAST'EN'ING INSERTING MACHINES Original Filed April l2. 1919 2 Sheets-Sheet?? Patented Sept. 27, 1927. Y

nAvin Macnnrnun, or iiennrsnnne,rnn'nsrrvanm..Assiettes-To Unrrnnsnoi: naomi-inni conrcnnfrion, or naw innerer, a CORPORATION on New JERSEY. 'i

noonomrzn'n rnsrnnrns-rnsnn'rnvs- MACHINES.

Application fue@ Afp-in is, 1ere, serial No. 289,692. Reaewea november 30, leas.

This invention relates to machines for inserting` 'tastenings iorthe purpose, tor e2;- ample, of securing' together the parts of boots and shoes. More particularly, the invention relates to power driven machines equipped ivith fastening supplying and inserting mechanism which, after being started, continue to operate through Lrepeated cycles until stopped by vthe operator. An object of the invention is to economize 'tastening` material by preventing Waste incase the machine is allowed .to run with no Work presented to it. y

The embodiment of the invention selected tor illustrationis herein shown and described as incorporated in a machine used in the art of shoemak-ing and knoWn commerciallyv as the consolidated handmethod lasting' machine, but it is to be understood that .various features of the invention are not ,limited to embodiment in this type ofmachine A; lasting machine of the above-mentioned type is treadle-controlled and remainsincontinuous operation through the `repeated'cycles as long as the operator holds the treadle depressed. lf the operator then, .as is a usual practice, does not release the treadle utter a shoe is finished and While he` is disposingot that shoe and securing' another to present to the machine, the machine Will go through a number of cycles idly, a tack being' expelled from the tack holder in each cycle and falling` to the floor.

Various mechanisms have been devised for preventing this Was-ite of, tacks. instance, in one such' mechanism the driver is ncrmally locked against movement, and power means rendered operative by the presence of the `shoe is provided to unlock the driver to permit its operation.l Since the time in which the machine is usefully employed will, un'dernormal conditions, loe greatly in excess of the time in which it is running' idle, it is highly desirable and .is an object ot this invention that the machine, when usefully employed, should utilize only the mechanism usuallyfprovided, the mechanism 'for reventi'ne Waste oftacks coming' into action only when the machine is runningidle. The wear ontheparts is thus radi-iced and they operation of the machine while. performing its Work is entirely' unat'tectedW- f- .f

Accordingly .al fetili.. .0f I consists in power operated mea sang te "i ,inventionv render. thefa'stening` inserting means functionlesswhenno Work ispresented tothe machine While it .is stillrunning. The illustrated organization comprisesA means for 'sapplyingv fastening material, reciprocating means. for insertingfastenings, and means, acting. in ,response to Vpresentationand Withdrawal of the Work-piece, .to render thesupplying and. reciprocating inserting. means operative and inoperative'toinsert fastening material. While the reciprocating .meansfcontinues to reciprocate. Asherein illustrated, means operated by power-of the machine acts in response to Withdrawal of the Workpiece toy render the .reciprocating tack driver inoperative, or unctionless. to. .insert ytacks While the ldriver continues to reciprocate.

ln this construction..instrumentalities are provided for supplying ,astenings and, insortingthe tastcnings, and ir". either .oft .these instrumentalities is rendered functionlessy no 'fastening will be inserted; Accordingly a further feature. of the vinvention .consists in a plurality of instrumentalities operating in predetermined time. relation through. repeated vcycles lto Ainsert tasteningsl into a Work-piece, and power means. acting automatica'lly to render oneof said instrumentalities viunctionless vvhenno Work-piece .is being, presented to thevmachine and the machine continues torun. .As shown herein, the machine is provided. vvithtack supplying mechanism, tack inserting means and, povver means rendered .operative inresponse to removal of theWorktofprevent"a tack. from being expelled, from the supplying -mechanism and Wasted.y (In, another .view the power vmeans.,which operatesivvhen .the machine is running idle to prevent eliective actionof the inserting means is {rendered inoperative by presentation ofthe. Work and the ltastening inserting means therefore is permitted to function.- Afsimple and effective mannerofapplying. this invention to the hand method machine is. toutilizethe tack carrier slideas the source Ot power for operating `a displacer whichris movably mounted l.on the y slide. and, which, through connectionY avitlifavvo'rkrest, is heldoutof operative position .when is presented to? the machine. When no y Work is. presented, however., theA displacen is automatically positon'edto' eneis amembjerii which .the-,tack d". r.,1e'. 1irf ...15d .t member to cause recip'r cation of thel driver in a path,

Y sented tack, and hence no tack is driven but the separated tack remains in the tack holder ready to be inserted by the first reciprocation `of the driver after it is permitted to resume its function Aby its presentation to the work.

In the drawings I have shown, and in the Y following specilication I will describe, only so much ot' the lasting machine as is necessary toexplain the manner in which the particular embodiment of the invention here illustrated is applied thereto, describing, however,l in complete detail all the parts, and their co-operative relation, of such embodiment. It further information is needed as to the construction ot' the lasting machine itsel't', reference may be had to Letters Patent of the United States No. 584,7 44, granted June 15, 1897, on application of Ladd and McFeely, and subsequent patents containing improvements on machines of the type there shown. Machines of the type disclosed in said patent are in wide commercial use, at the present time and it is to machine ot this type that the present invention is shown as applied. In the drawing,

Figure 1 is a sideelevation of that part of the lasting machine to which the invention is applied, showing the tacksupplying and inserting mechanism in the condition they are'caused to `assume bythe construction embodying my invention when the shoe is not in position 'to be acted upon. Figure 2 is similar view showing the same parts in the condition assumed whena shoe is presented to be lasted. Figure 3 is a. plan view ot the tack-feeding meansand of the stop which I have provided as a part of this invention ,for preventing operation thereo'l. Figure 4 is av view similar to Figure 3 illustrating -themode ot action ot said stop. Figure 5 is front elevation, with parts broken away and shown in section ot the mechanism in the same position as illustrated in Figure 4. Figure 6 is a plan view similar to the Figures 8 `and 4 but showing the vfastening feeding mechanism in a difterent position and thestop therefor rendered inoperative by placing the shoe in position to be worked on.

The same reference characters indicate the saine parts in all the figures.

Referring now to these drawings `7 andf8 represent parts ot the rigidtrame of the lasting machine, 9 represents a bracket-.projecting` at the front end .ofthe machine and IO representsa rest which is supported by the bracket 9 and is provided to steady a shoe being lasted, the operator holding the shoe so that its. bottom bears" against `the rest when presenting the edges of the upperv to be grasped `and tensionedby the grippers and toreceive tacks. 11 is a tack drive;- and 12 the driver bar which carries it, this bar being alternately raised and driven downward by mechanism with which the machine is provided, and being also hinged or swiveled so that it can swing in a vertical plane extending from front to rear of the machine, that is, l'roin lett to right and the reverse with respect to Figuresl and 2. 13 is a raceway provided with two tack chan-v nels 14 and 15 adapted to `conduct tacks ot different lengths from hoppers or `magazines, and 16 is a iteeder tor the tacks, usually called a. separator-which is mounted. in a guideway comprised-by a. front wall 17l` a bottom plate 18, a rear lug 19 on said plate, and a `cover plate 2O.` rIhe plate 18 is secured to an arm or holder 21 which supports the raceway, the raceway 4guide land the separator. The 'cover 20 and bottoni plate 18 have a tack passage 22 and the cover 20 has a rear entrance channel 25 with which the outlet oi either raceway channel is adapted to be brought in register, and the `separator is constructed and operated to pick the tacks oneby one from the registering channel and transfer them .int-o the passage 22. To do this the separator equipped with a plate 24 having an edge which travels close to the end ot the raceway and terminates in a picker point 26, from which an inclined slot 27 leads to a` hole 28large enough to admit the tack head and adapted to be registered with the passage 22. At the opposite side ot the slot 2T from the picker point the plate 24 is `t'oin'ied 'Jil tlf)

itHi

with an abutment 29 which arrests the torward tack inthe raceway'when its shank is advanced tar` enough topermit the picker point 26 to pass behind it. In the normal action of the machine the separator is mover back and iorth, and in each tra-verse to the lett, with respect to Figures 3 to 6, it transfers the endmost tack `from the raceway to the y passage 22. y

30 represents a. slide or carriage adapted to reciprocate left andright, with respect to Figures 1 and 2,\on the machine frame, and carrying a tack holder 31 whichiprojects `beneath the plate 18 and is provided with a tack passage, at each side ot which are spring retained tack lingers for supporting thetack until itis driven out from between them by the driver 11. lllhen the slide Sois in the right Vhand position, shown in Figure 1, it receives a tack `from the passage 22, and when it is brought to the lett hand position, shown in Figure 2, it carries the tack into the path of the driver, whereupon the driver acts to expel the tack from the tack holder, and drive-it into the slice, when a shoe is being presented to the machine. i i

The slide 30 operates the separator 16, doing so by means of a cam, which I have not shown in these drawings because Vitis a part liti of the previously' existing inaohineQ-jvhich wipes over an antiiriction r'o'll 32 carriedby :in arm' 33 (see Figure Which'is `pivoted to the support 2l upon a: pivotv 34; and upon the sume pivot is un urm carrying a gear segment 36 which meshes With rack teeth on the roar side of the separator lo'. rEhe arm 33 is separate from the arm 35, and is provided at one side of the pivot 34 with a shoulder 3S which bears against an abutment surface on the sideolthe arm 35; vfhile the other side ot the pivot it Curries a plunger 39 movable ina' socket 404 and pressed upon by a spring' 4l Which plunger bears against a fingerv 42 connected to the arm A stiff spring 43 interposed betvveen the erm 83 and an abutment 44 on the rigid part 2l, normally holds the armsl 33 and 35 in the position shovvn in Figure 3, in which the separater i6 is inthe extreme lett hand position Where the hole 28 is in regis ter with the passage 22. The pin 45 shown in Figure 8 is simply a guide vifor the spring to prevent the latter from buckling. This pin hns a ball and'soclret mounting on the abutment 44 et one ot its ends, and its other end passes 'lreely through a hole in the end or the arm 33. Thespring 43 isthe means which drives the separator when transiter'- ring a tack 'from the racevay to the passage The retract-ion of the separator preparatory to mal-:ing this transfer is caused by movement oi the slide 80. In this movement thc cam on the slide 30 which directly hears on the roll swings the arm 83 t0 its i'nll movement, and normally would shift the separator toits fully retractedA position; but since the means lforvthus moving the scpzrator includes the yielding plunger 39, it is. possible to arrest the separator be= fore it has been retracted far enough tov pick l Without resulting in? damage to i tuen, any nart or the machine. This condition is inent'in a guidev'vsy 47 on the end' of the braclrf-t erin 9, as appears lfrom' a' compari- Qx 1;;"1, i l2 l en o i .guics i anc einen iespec we .y indicstethe limits of this niovement-Q` A shoulder 48 on thev slide limits? the-'u' miveinent there-oit strilrrr the levier? edge of the guideway, While a lug 50 projecting igea-esse ard thrfoughaiioftch 51 in" the side of the guide- *f'fiy limits the doivnivaidmovement"of the i' To theta-rin or lug 'Othere Vis pivote'd an arniQ terminating' in` a' hook 53 Whichis l cated in plane at right angles to the length of arm ivhicli'ho'k receives and supports ther s\vingingpart of u lever 54 which isconnected by ar pivot 55 with a tulci'u'iii plate 56I secured tothe rigid machine r'ame'by bolts 57 and 58. These bolts are provided as connecting parts the commercial inechine'of thel type Ito whic'lil have reierred, Wh'e'reforethe mounting o'ix thefu'lcruni provided for the lever involves only the provision ota suitable plete, 'as the plate 5G, adapted tov be inountedupn these bolts und gripped-against the sides ot the `traine part by the heads of tlie bolts or nuts scr'eived on theA bolts Preferably thev holes in the plate 5G through which said bolts passere Widei` in both rdimensions than the bolt slianksa -ivherx'efore a certainrangeot adjustment is'y permitted both'upl anddown and forward and bclr'ivard.

lheif'e'ispivoted between lugs 59'onthe n'nder side of the platezlS, allev'er() having one arm turne'dupto pass through 4a slot (il in fthel plate, "its eiid te'rininatln'gy in ay stopv or abutment'621` in the pfath" of theseparator, such 'zt-butn'ient'beingedapte'd when the lever is ini the" positin'shoivn in Figures 3, 4, and 'by full lines, to' arrest the separator be# i'orev it hasbeen Withdrawn'far enough to pick off arv tack from the racei'vay by its picker point 26,1 and to be withdrawnout of the Way of the'separator When" the lever 60 is put nearthcf position shown in" Figure 6', and by dotted-'linesintFigure 5. A' link 63 is co'n nected'toY this' lever by apivo'tfpin 64 und lo the'lever 54 by a rod V651 One end oi' ro'd (55 passesthroufh afbossf'fon the link 63, in Whic'lijit is securedby irse't'screv- 67, while its other e'ndii's formed'as a ho'o'l'r and is passed through' a hole 68 'in the lever 54.l A spring-69bettveen the plate 18 and leverGO tends to' holdL .stop 621 in its 'obstructing position, this 'being-the posi-tion' shown in Figures 3', 4, and 5,v and to' this tendency is added theV Weightof the lever 54 and of thelink Connection' beti'v'een the' tivo7 lever-s. Evidently' raising of: lever 54`vvil'l Withdraw the stop 62; v f 4 v The stir-'ne lever' o4 "controls"a'deviceior displacing the driver, this Abeine 'in fthe con` struction here shfoivnj 'loop ory is U shiped and theren i otiv'hich'y have trun'n'ion's v7l ee''culiyiiigfV bearings* int plates' @which are secured upenopposite sides oi thel slide 30 byu bolt'f'. I Oneerni vof this bail Vca`="ries` a 74"*vvhifch projects over the lever 54,'nndY is dra-Wn ltoWafrdsaid lever by 'a spriigT. Thelc'fop end of thebail is ade-pteclftd-"dro 35 betiveeii s j' pusher or Wedge blocl'' e5' sli-'dSOVanid'a ooni`" plemental surface 77 on the' driver bar, or

bail which Eil) lof.;

lio

to be raised abovethe upper termination of the surface 77 oppositeto aV recess 78. If the slide advances when the bail or displacer 70 is Vin the lowered position, it moves the driver out of the way, as shownby dotted` lines in Figure 2, so that it can not enter the tack passage in the nail holder 3l. But if the displacer 70 is raised when the slide 30 comes forward, the driver is` left in position to pass through the said passage and eject the tack from the holder 3l.

`It will now be understood that when there is no shoe in place to receive tacks driven by the tacking mechanism, the lever 54 takes its lower position, whereby the separator stop 62 is placed to obstruct the separator and the displacer 70 is positioned to displace the driver. Thus even though the machine continues in operation, the driver is unable to eject the tack already in the holder 3l. Also the separator is unable to feed any more tacks because it is stopped, every time the slide 30 movesforward, before it has been moved back far enough to pick oli' a tack on its next forward movement. `Butwhen the operator presents a shoe in position to be lasted, the upward pressure which he necessarily applies to the rest10, in order to hold the shoe steady, causes said rest and the arm 52 to be raised, thereby raising lever 54 and withdrawing the stop from the path of the separator or feeder, and the displa'cer from between theparts 76 and 77. rI`hen n each forward movement of the slide 30 the holder 3l is brought into the path of the driver, permitting the tack already in Vthe holder to be driven, and the separator is retracted farenough to pick another tack from the raceway, and on the retraction of slid-e 30 the separator is carried forward, picking olf a tack andtransferring it to the passage 22, whence it drops into the holder 3l in readiness for the next stroke of the driver. When', after completion of the fwork on one shoe, the shoe is laid aside, the rest l0 drops toits lower position and the stop 60 and displacer 70 become again operative toiprevent feed-` ing or ejection of tacks.` By this means waste of tacks is entirely prevented, whereas in the previous mode of operation of the machine without my attachmenttacks are Y fed and ejected whenever the machine is run without there. being a shoe in place to receive the tacks.

I would have-it understood that the protection which I claim for this invention is not limited `to an attachment to a lasting machine, or to the combination of the novel means and mechanisms, or equivalents thereof, which I have here shown with thel associated parts of the lasting machine. On the ,contrary I claim protection for all equiva lent embodiments of the invention here disclosed applied to allpossible uses.

. `What I claim and desire to secure by Letwork, and means for rendering said displacer inoperative when a work-piece is pre sented to receive a fastening.

2.A In a machine for setting fastenings, the combination'with a `movable feeder, a driver and means for operating them, `of a stop for obstructing said feeder and avdisplacer for shifting the driver intoaposition wherein it is unable to act on a previously fed fastening. ,Y

3. The combination withr a fastening inserting machine having a driver normally operating through a fastening holder,` a feeder for feeding fastenings to said holder and means for operatingthem, a stop for obstructin, the operation of saidV feeder, a dis-V placer for shifting the. driver so that on its operating movement it does not pass through said holder, and meansl controlled by the pre* sentation of the article intended to receive the fastenings for making said stop and said displacer both inoperative.

4t. In a fastening setting machine, the combination with a raceway, a feeder fortransferring fastenings from Asaid raceway, a holder having a passage to which thefasten- `ingsare so transferred and in Vwhich the fastenings are held untily ejected,ia driver for expelling fastenings from said holder and setting them in an article placed to receive them, and mechanism automatically operative for moving said feeder, holder, and

driver in required sequence, of a stop ar` ranged to limit the movement of the feeder.`

to a degree in which it is ineffective to transfer fastenings, a displacerorganized to shift Y the driver into a path at one side of the passage for the fastening in said holder and being itself displace-able from the location in which it does so, a rest against which said `rt'icle is placed to receive fastenings, said rest being movableby the article when so placed, and connections bywhichfsaid rest in its movement displaces said displacer 'into its inoperative location and moves said stop into inoperative position. y

5. In a fastening `driving machine, the

combination with a holder for fastenings having a driving passage, a driver adapted c to pass through` said passage Vand expel therefrom a fastening heldin the passage, a work rest adapted to steady an article placed to receive fastenings from saidholder under the impulse' of-ftlie -dr'iver,saidrest being displaceable under pressure applied? by the article soplaced, aiid'tl'i'e driver being displaceable to a'vpaith beside that in whichl it ejects fastenings as set forth, displacing means arranged and operable to shift the driver intosuch path when no article isl the holder between a fastening-receiving po` sition, in which its passage is at onel side of the driver and a position in ,-Whiolis'uch pas-` sage visin the normal path of the driver, la displacer carried by said oarriageadapted to i occupy different positions, iii'on'e of `which' it bear-s upon and displaces the" driver as aforesaid, and in theotlier'of which it passes Without displacing vthe driver, a movable Work rest, and connections controlled by said Work'rest for causing said displacer to be put in the second or thel firstposition, -respectively, Aacc'orc'ling as an varticle to receive fastenings is pressed against said rest or isH not pressed against it. n

7. In a lasting machine, the combination with a reciprocative tack driver, a laterallyl` movablelcarriage, and a' tackholder having a channel movable therewith to bring said channel between a receiving position 'at one side of the path of the driver and a'position in such path, ythedriverbeing displacea-bleout of said path, of' a displacer carried by said carriage adapted to occupy a position in Whichrit shifts the driver out of its' normal' path When the tack "holder is brought into'j position for driving, a 'Work rest'fagainst which the shoe to be lasted is held in position to receive tacks, said Work rest being movable underthe pressure Vapplied by a shoe" so held, and connections by which said. rest` Whenv so moved shifts said displacer from the position specified into a different posi tion wherein it clears, Without displacing, the driver.

8. A tackk driving-inechanism comprising the combination ivithla tack holdei, a tack driver, andv a slide movable to shiftsaid tackliolder from a receiving positiontofaVv driving positionv in line with :the: driver, .the driver, being adapted -to be displaced from such line,f'of a displacerfcarried by.r

the slideadaptedto occupy a position in which it lbears-iipon and displaces thedriver at 'the saine time 'that the holder is brought into the drivingposition, saidl'displacer be'- rso 'ni'oved'fforfshifting the'd'isplacer into the 'V ing movable into allocation Where it avoids the driver, an ope-'rating lever, -a finger onl saidy displ'acer' overlying fsa-id lever and adapted 'to be' engagedtherebyf, and a Work rest connected to said: lever and movable in a iliiection causing'the lever'jto slilift said acer in'to'- the last 'named position.

y A t'ackdriving mechanism comprising the `ooinbination with afftack holder, a tack dr'iver,*aii`d a slide'niovable' to shi-ft said tack" holder from# a receiving position to fa driving-'positioninline vvit'li the driver, the

driver' being" adapted yto' bedisplaced from such; line, of a displaceroarried by t'he slide adapted to occupy a position in lwhich lit bears upon-and' disfp'lacesk the driver at they same tin'ie thatth'eholder is brought vinto the driving positioin-s'aiddisplacer being movable into af location WhereA it avoids the against `itl in'fpo'sitionfto receive fasteni-ngsl` and/connections Iactgi'iatedfby said rest when last named position. A i

"lOIn'a' machine forsetting fastenings, thefcombinatioii Witflia driver, and 'means' for feeding fastenings` into tlie normal path of opera-tion ofsaiddrivenof `astop for obstri' ting1 said vfeeding;means, a displace'r `for' shii iiigtlie driver so that in itsVV operative movement it does not operate onxa previously v fed fastening and means controlled by presl enta'tion of aiiI article intended to" receive sucli fastenings forl makiii'g'said stop and said displacei both Iinoperative.y v y vlljln'fa' -machine for1 setting fasteniiigs, the combination of a racevvay, a feeder'fan fastening-se ting'fdii'ver, andnieans for'operating4 them, rvaf's'top yfor-*obstructing said' feeder, and a'displacer for 4'shifting the driver out' ofitsdrivingpathzinto al position Where in' it'is"fun'ableto'y vact on a previously fedi fastening.v

`lgllii Aa machine for-setting'fasteniiigs, the' combinatioii `ivi'th feeder, a fasteningset-tingfdri'ver, andvmeans foroperating them,

offa stopfor obstructing said? feeder, means i for render-ing the stopv inoperativev as such,

i and aclis'placer'lfoi"shifting the driver ,into

afposition"ivlierein'it'is unable to act on a pre'vioiislyfed:fasteningV i 135 Inka machine for,y settingy fastenings, the combination ofr a driver adapted to oper-k atevalo'a given path, means forZ feeding fasteniigs' int saidy p ath,a stopfforf obstructv` ing sa-idffeedi means, a `displace'r'for shifting the driver? out of saidpath, lwhereby itis'v iin'ablelto actloira previously fed fastening, and means controlled? by 5 presentation of yan article intended to A'receive sii'cli1 fasteniiigv fory makingv said-stop and vsaid displacer botliinr` operative; f f i ll'fln a fastening 'setting machine, a feeder' for ybr-iin'ging' fasteniiigs into* position tobe driven, a driver arranged and operable toset the fastenings so positioned, mechanism for operating said feeder including a yielding connectionadapted to yield when the feeder is obstructed, a pivotally mounted stop adapted to be placed across and withdrawn from the path in which said feeder moves, a controlling device against which work pieces are pressed when in position to receive fastenings, said controlling device beingarrangedand movable to occupy onepo-` sition when so pressed upon` bythe Workpiece, and to occupy a different position vwhen there is no work-piece so placed, a

pivotedV lever engaged with said controller and movable thereby, and a link between said lever and said stop; the lever, stop and link being so arrangedjthat` when the controller is displaced by pressure of a workpiecethe stop is withdrawn from the path of,

Vthe feeder, and when the controller occupies the other` of its above described positions the stop is interposed in the path of said feeder, whereby the operation ofthe latter is then prevented.` d

15.111 a machine of the class described, the combination of tack-supplying mechanism including Va tack holder for retaining a sepa- 1 rated tack, tack-inserting mechanism, and

means operated by power ofthe machine and.A rendered active by withdrawal of the work fastenings, means operating in each cycleV when-no work piece is presented to cause displacement of the inserting means without aecting its reciprocating movement sothat the separated `fastening is not driven but rey mains in the holder, and means responsive to presentation of the workpiece lfor rendering the displacing means inoperative so that the fastening in the holder will be inserted by the first reciprocation of the inserting means after the Work piece is presented. f

17. `In a fastening-inserting machine, the combination `with means for separating individualfastenings, reciprocating means for holding aseparated fastening and presenting itin'position to be inserted, reciprocating means for inserting fastenings, and

means responsive to presentation and withdrawal `of the workpiece to cause relative alteration of thepaths of reciprocation of said two; reciprocating means without affecting their reciprocating movement` so that nol` fastening will be driven when no work piece is presented and a fastening will be inserted 1 by the first reciprocation of the inserting means when a work piece is presented.

18.` lin a fastening` insertingl machine, the

combination with means for supplying individual fastenings,vv a reciprocating instrument forinserting the fastenings, and means controlled by the presentation of the workl piece to render said instrument effective or ineffective by moving it laterally while. it continues to vreciprocate uninterruptedly.

19. In a niachineof the class described, a plurality of instrumentalitiesoperating in predetermined time relation, through repeated cycles, to separate and insert fasteningsinto a work-piece, power driven operating means therefor, and means operated therefrom for automatic-ally @rendering l one of said instruinentalities vfunctionless When no work-piece is presented tothe machine and the machine continues to run.l Y

20. In a machine of the-class described, tack supplying mechanism, tack inserting means, power driven operating meanstherefor, and means operatedtherefrom adapted-f to be rendered operative by the absence of the work to prevent a tack from being eX- pelled from the supplying mechanism. l

21. In a machinerof the class described,

tack supplying mechanism, Vtack inserting means, power means moved in eachv cycle when the machine isrunning idle to prevent effective action of the insertingv means, and means rendered effective upon presentation of the work to the machine `to cause the said` power means to become inoperative."-

'22 A machine ofthe class described having, in combmatiomvtack supplying and in;`

serting mechanism, power driven operating means therefor, means operated therefrom` adapted to'render said mechanism ineffective to insert tacks when no work is in position to receive them, and devices operated by the presentation vof the 'work to render said means ineffective s o that tacks will `be `inserted` in the work. c

23. A i tacking machine havin@ g, in combiy diiiatioii, tack feeding Iand driving mechanism arranged and operatedto insert a plurality 'iis of tacks, in uninterrupted succession, one in each cycle, and power means operated in each cycle to render the `driving mechanism Vineffective to insert tacks when no work is.V

presented to receive them, said power means being rendered inoperative to jprevent `insertion of tacks when work is presented to' receive the tacks.

24. A machine l,of the class described having, in4 combination, tack supplying means, a

reciprocating driver for inserting thetacks into a work-piece, power means automatically operative when the work-piece is withdrawn `fronithe machine yto displace the driver from its normal `path ofreciprocation.

ilse

25. A machine ot the class described having, in combination, a tack separator, a tack carrier movable to carry a separated tack to driving position, a reciprocating driver arranged for movement to aline it with the tack in the carrier, means operated by the carrier to etiect movement oit the drivell ont of alinement With the tack in the carrier, and means responsive to contact With the Work to control said carrier-operated driver-positioning means.

26. A machine of the class described hav-l ing, in combination, a reciprocatingl driver for inserting` the tacks, means for presentingl tacks in position to be driven by the driver into work presented to the machine, and power means automatically operative when the work is Withdrawn trom the machine to cause the driver to reciprocate in a path diffe-rent from its normal path to prevent Waste of tacks until Work is re-presented to the machine. i y

'27. A machine oi' the class described having, in combination, a tack separator, a tack carrier movable to carry the separated tack to driving position7 a reciprocatingrdriver arranged for pivotal movement by the carrier to aline it With the tack in the carrier, means operated by the carrier to eifect t'nrther movement of the driver out of alinement with the tack in the carrier, and means controlled by engagement With the workA to move said carrier operated means out ot' operative position.

In testimony whereof I have affixed my signature.

DAVID MACARTHUR. 

